This is an excellent resource.
Since chaos wants this to be in the site, I would volunteer to compile the formulae in LaTeX and convert them as images. Otherwise the formulae would appear really amateurish in the site.
I would like to correct some things.
The damage formula itself isn't 100% accurate, but there's an article already dedicated to that, which this article can refer to.
In the Critical Hits section, the way it is written holds only for RBY. There, it is actually true that the Level was the thing that doubled. From GSC onwards, this is no longer the case. The Critical Hit doubles in the place that is mentioned in the Damage formula article. Reflect and Light Screen are ignored as well in a critical hit.
Also, Focus Energy raises the critical hit domain by 2 and not by 1 in DP, unlike what's written in the article. And high critical hit moves raise the critical hit domain by 1 and not by 2 in DP (there's a mistake: high CH moves used to increase the CH domain by 2 and not by 3 before DP!)
In the stats formula section, I always write one formula that holds both for HP and for the other stats:
Stat = floor((floor((2 x BS + I + floor(EV/4)) x Level / 100) + X) x N)
where X = 5 if stat is not HP, and Level + 10 if stat is HP.
In the status effects section, the burn attack halving effect does not actually happen to the stat in DP but it happens as per the damage formula article.
I'll check the ball catching formula and the experiece formulae when I get the chance.
For all your Pokemon needs (and more!) including: the Defensive EVs
applet, the Probabilities of Breeding IVs in Pokemon
applet, and the Ratings of Pokemon Base Stats
applet (now Version 2.0!)
. And also the IV to PID